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Finding the Fourth Proportional to 68,906.65, 103,353.90 and 18,982.30

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Solution

The fourth proportional to 68,906.65, 103,353.90 and 18,982.30 is: 28,471.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,906.65 : 103,353.90 = 18,982.30 : x
  2. Step 2: Convert to fraction form
    68,906.65/103,353.90 = 18,982.30/x
  3. Step 3: Cross multiply
    68,906.65x = 103,353.90 × 18,982.30
  4. Step 4: Simplify right side
    68,906.65x = 1,961,894,735.97
  5. Step 5: Solve for x
    x = 1,961,894,735.97/68,906.65
  6. Step 6: Final answer
    x = 28,471.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.